DELETE FROM assignments_submission_essay
DELETE FROM assignments_submission_essay_comments
DELETE FROM assignments_submission_quiz
DELETE FROM evaluations
DELETE FROM evaluations_submissions
DELETE FROM log_error
DELETE FROM log_error_userreport
DELETE FROM "relations_course-user"
DELETE FROM "relations_evaluations-courses_section"
DELETE FROM scheduledemailstosend
DELETE FROM stats_learnobjs
DELETE FROM stats_quiz_questions
DELETE FROM users WHERE accounttype = 'student'
DELETE FROM users_stats_login